Castable for ferrovanadium smelting furnace and preparation method of cast permanent layer

Abstract

The invention discloses a castable for a ferrovanadium smelting furnace and a preparation method of a cast permanent layer. The castable is prepared from components in percentage by weight as follows:67.5%-68.5% of brown fused alumina, 19.5%-20.5% of white fused alumina, 6.5%-7.5% of fused magnesia, 3% of alumina powder, 2% of silica dust powder as well as a binder, stainless steel fiber and anti-explosion fiber, wherein the binder accounts for 0.2% of the total weight of above components, the stainless steel fiber accounts for 0.5% of the total weight of the above components and the anti-explosion fiber accounts for 0.03% of the total weight of above components. The prepared cast permanent layer has higher strength and can effectively prevent corrosion and washing of high-temperature molten steel in a steelmaking ferrovanadium smelting process; the usable times through one-time casting is far higher than that of a magnesia brick permanent layer, collapse can be avoided, so that frequent replacement is not required, consumption is effectively reduced, the service life is further prolonged, the production cost is lower, moreover, the cost for replacement of the permanent layer is saved, and the production cost can be further saved.

Description

technical field [0001] The invention relates to the technical field of vanadium extraction in steelmaking, in particular to a casting material for a ferrovanadium smelting furnace and a preparation method for a casting permanent layer. Background technique [0002] At present, the permanent refractory layer of the straight tube furnace for ferrovanadium smelting is made of 165×115mm magnesia bricks, and the working layer is made of magnesia and magnesia fire clay. Since the magnesia bricks are not dense and loose, the vanadium The iron penetration is serious, and because the permanent layer can only be used for less than 10 furnaces at a time, it will lead to frequent replacement of the permanent layer, the consumption of magnesia bricks is too fast, and the production organization is difficult. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a castable for ferrovanadium smelting furnace and a method for preparin...

AI Technical Summary

Problems solved by technology

[0002] At present, the permanent refractory layer of the straight cylinder furnace for ferrovanadium smelting is made of magnesia bricks with specifications of 165×115mm, and the working layer is made of magnesia and magnesia fire clay. The iron penetration is serious, and because the permanent layer can only be used for less than 10 furnaces at a time, it will lead to frequent replacement of the permanent layer, the consumption of magnesia bricks is too fast, and the production organization is difficult